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<?php
/**
* FusionForge Database Installer Class
*
* Copyright (C) 2010-2011 Alain Peyrat
*
* This file is part of FusionForge. FusionForge is free software;
* you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software
* Foundation; either version 2 of the Licence, or (at your option)
* any later version.
*
* FusionForge is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with FusionForge; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
class DatabaseInstaller extends Error {
/**
* __construct - DatabaseInstaller constructor
*
* @param string $name If set, name of plugin.
* @param string $path If set, path of upgrade scripts.
*/
function __construct($name = '', $path = '') {
$this->name = $name;
$this->path = $path;
}
/**
* install - Run database install scripts (for plugins)
*
* @return bool|string Output
*/
function install() {
$name = $this->name;
$path = $this->path;
$init = "$path/$name-init.sql";
if (is_file($init)) {
$ret = $this->_runScript($init);
if (!$ret) {
return false;
}
return $this->upgrade($name, $path);
}
return $this->setError(_('No database installation scripts found.'));
}
/**
* upgrade - Upgrade database with upgrade scripts (usually in src/sql)
*
* @return bool|string Output
*/
function upgrade() {
$name = $this->name;
$path = $this->path;
if ($name) {
$prefix = $name.':';
$date = -1;
} else {
$prefix = '';
$date = $this->getDatabaseDate();
}
$scripts = $this->_getScripts($path);
$output = '';
foreach ($scripts as $script) {
if ((int)$script['date'] > $date) {
$res = db_query_params('SELECT * FROM database_changes WHERE filename=$1',
array($prefix.$script['filename']));
if (!$res) {
return $this->setError("ERROR-2: ".db_error());
} elseif (db_numrows($res) == 0) {
$output .= "Running script: {$script['filename']}\n";
$result = $this->_runScript($path.'/'.$script['filename']);
if ($result) {
$res = db_query_params('INSERT INTO database_changes (filename) VALUES ($1)',
array($prefix.$script['filename']));
if (!$res) {
return $this->setError("ERROR-3: ".db_error());
}
} else {
return false;
}
}
}
}
return $output;
}
/**
* getDatabaseDate - Get status (date format) of the database.
*
* @return bool|int date if success, false otherwise.
*/
private function getDatabaseDate() {
// Check if table 'database_startpoint' has proper values
$res = db_query_params('SELECT * FROM database_startpoint', array());
if (!$res) { // db error
return $this->setError("DB-ERROR-3: ".db_error()."\n");
} elseif (db_numrows($res) == 0) { // table 'database_startpoint' is empty
return $this->setError("Table 'database_startpoint' is empty, run startpoint.php first.");
}
return (int)db_result($res, 0, 'db_start_date');
}
/**
* _runScript - Execute migration script given as argument (file)
*
* @param string $file Filename
* @return bool True if success
*/
private function _runScript($file) {
// If a condition statement if found, then run the script only if true.
$content = file($file);
if (preg_match('/^-- TRUE\? (.+)/', $content[0], $match)) {
$res = db_query_params($match[1], array());
if (db_result($res, 0, 0) == 'f') {
return true;
}
}
$res = db_query_from_file($file);
if ($res) {
while ($res) {
db_free_result($res);
$res = db_next_result();
}
} else {
return $this->setError(_('Database initialisation error:').' '.db_error());
}
return true;
}
/**
* _getScripts - Return a sorted array of available database upgrade scripts.
*
* @static
* @param string $dir
* @return array
*/
private static function _getScripts($dir) {
$data = array();
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
$pos = strrpos($file, '.');
if ($pos !== false && $pos > 0) {
$name = substr($file, 0, $pos);
if (strlen($name) >= 8) {
$date_aux = substr($name, 0, 8);
$type_aux = substr($file, $pos + 1);
if ((int)$date_aux > 20000000 && ($type_aux == 'sql' || $type_aux == 'php')
&& strpos($file, 'debian') === false
) {
$data[] = array('date'=> $date_aux, 'filename'=> $file, 'ext'=> $type_aux);
}
}
}
}
closedir($dh);
}
usort($data, array('DatabaseInstaller', '_compare_scripts'));
reset($data);
}
return $data;
}
/**
* _compare_scripts - compare script for sorting (using filename)
*
* @static
* @param array $a
* @param array $b
* @return int
*/
private static function _compare_scripts($a, $b) {
return strcmp($a['filename'], $b['filename']);
}
}
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